<?xml version="1.0" encoding="UTF-8"?>
<!--
create table R1(a varchar) WITH (appendonly=true) distributed by (a);
create table S1(b varchar) WITH (appendonly=true) distributed by (b);
create index idx1 on R1(a);
create index idx2 on S1(b);
create table R2(a varchar, primary key(a));
create table S2(b varchar, primary key(b));
insert into R1 select i from generate_series(0,10) i;
analyze R1;

explain select * from R1 inner join S1 on a = b union all select * from R2 inner join S2 on a = b;
                                       QUERY PLAN
 Gather Motion 3:1  (slice1; segments: 3)  (cost=0.00..1299.00 rows=1 width=16)
   ->  Append  (cost=0.00..1299.00 rows=1 width=16)
         ->  Nested Loop  (cost=0.00..862.00 rows=1 width=4)
               Join Filter: true
               ->  Table Scan on s1  (cost=0.00..431.00 rows=1 width=2)
               ->  Bitmap Table Scan on r1  (cost=0.00..431.00 rows=1 width=2)
                     Recheck Cond: r1.a::text = s1.b::text
                     ->  Bitmap Index Scan on r1_a_idx  (cost=0.00..0.00 rows=0 width=0)
                           Index Cond: r1.a::text = s1.b::text
         ->  Nested Loop  (cost=0.00..437.00 rows=1 width=16)
               Join Filter: true
               ->  Table Scan on r2  (cost=0.00..431.00 rows=1 width=8)
               ->  Index Scan using s2_pkey on s2  (cost=0.00..6.00 rows=1 width=8)
                     Index Cond: s2.b::text = r2.a::text
 Settings:  optimizer=on
 Optimizer status: PQO version 2.53.0
(16 rows)
-->
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